RT Book, Section A1 Abdeen, Ayesha A2 Bajwa, Zahid H. A2 Wootton, R. Joshua A2 Warfield, Carol A. SR Print(0) ID 1131933797 T1 Osteoarthritis of the Major Joints T2 Principles and Practice of Pain Medicine, 3e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071766838 LK neurology.mhmedical.com/content.aspx?aid=1131933797 RD 2024/04/19 AB Osteoarthritis (OA) is the most common form of arthritis. Also known as degenerative joint disease, OA is characterized by loss of articular cartilage within a joint resulting in chronic pain, stiffness, deformity, and subsequent functional disability. Osteoarthritis may be classified as primary/idiopathic, for which the cause is unknown, or secondary osteoarthritis, which occurs as a result of trauma, infection, neuropathy, bone ischemia, congenital abnormality, chronic inflammatory arthropathy, or other cause.